'Though ostensibly presented as a raucous family adventure -- a 'Vacation' for the PG crowd -- 'Wimpy Kid' is instead a dirge of unfunny scatological material, techno-anxiety and child endangerment masquerading as familial bonding. Settle in for the 'Long Haul,' because this is one bumpy and miserable ride.'

10. 'Birth of the Dragon' -- 19%

YouTube/BH Tilt/WWE Studios

Philip Ng portraying a young Bruce Lee.

The Bruce Lee biopic 'Birth of the Dragon,' attempts to encapsulate the life of action star Bruce Lee, and martial arts philosophy, 'but the film never really gets fully juiced until the climax,' according to the New York Times' Glenn Kennt.

9. 'Baywatch' -- 19%

Paramount Pictures

Dwayne 'The Rock' Johnson and Zac Efron as hunky life guards in 'Baywatch.'

So many lifeguards in this film, yet none of them could save it. Skimpy swimsuits, weird jokes about male genitalia, and 'The Rock' weren't enough to get critics on board with 'Baywatch.'

'Unlike the setup, the story founders and cramps like a tourist who swam too soon after an all-you-can-eat buffet, which is pretty much the only thing the filmmakers don't toss into the water by film's end,' said NPR film critic Bob Mondello.

8. 'Wish Upon' -- 18%

YouTube/Broad Green Pictures

Joey King inspecting the evil wish making box.

'Wish Upon' is a horror movie about a teenage girl who wishes for all of the things a stereotypical uninspired teenage girl character would wish for: popularity, a cute guy to be into her, and so on. 'The Craft' already served up a more nuanced version of this movie nearly 21 years ago.

'What would you wish for? World peace? Instagram fame? Or maybe for Hollywood to stop making horror films so needlessly violent, so deeply cynical, so aggressively targeted at teenage girls.'

7. 'The House' -- 17%

YouTube/Warner Bros.

Blowing dice didn't bring Poehler and Ferrell luck at the box office.

Will Ferrell and Amy Poehler's film about two parents struggling to pay for their daughter's college tuition by opening an illegal casino in their home didn't have much luck at the box office.

'Instead of writing actual characters, they have hired a gaggle of beloved comedians to do bits based on stereotype and persona, and have concocted a cockamamie suburban crime story that manages to be both bizarre and incredibly thin,' said critic Katie Walsh.

Ouch. Maybe Cruise's sixth instalment of 'Mission Impossible' will have a better showing when it's released next summer.

5. 'The Dark Tower' -- 16%

Sony

Idris Elba looking into the distance...for another role.

It is a sad day indeed when Idris Elba ends up in a film unworthy of his acting talents, but this too shall pass. According to critics, the film adaptation of Stephen King's 'The Dark Tower' lacked excitement, and consistency, with the film's only saving grace being its actors.

L.A. Weekly's April Wolfe wrote,'Outside of its actors, the film is unremarkable. Action sequences seem as though they were hurried, that is, when you can actually see them -- Did the lighting team blow a fuse?'

4. 'All Eyez On Me' -- 16%

Open Road Films

Demetrius Shipp Jr. as Shakur in the upcoming 'All Eyez on Me' film.

This summer wrought not one but two failed biopics. Without any subtlety, the Tupac Shakur film, 'All Eyez on Me,' fumbled at the box office.

'All Eyez on Me is rarely more than a faithful adaptation of the rapper's Wikipedia entry, so fixated on name-checking every footnote of Shakur's public life that there is no space to explore the experience of the man himself.'

3. 'Transformers: The Last Knight' -- 15%

Paramount

Mark Wahlberg in 'Transformer: The Last Night.'

Director Michael Bay released yet another 'Transformers' movie this summer, the fifth in the ever-growing franchise. And this time he threw King Arthur and Merlin into the mix. Why? It's hard to say.

The film's convoluted plot and bizarre inclusion of Harriet Tubman (not a joke!) earned it one of the lowest ratings of the summer.

In a review of 'The Last Knight' for the New York Observer, Oliver Jones wrote, 'I am not going to try to explain the story -- after watching this movie I may never try to explain another story ever again.'

2. 'The Nut Job 2: Nutty By Nature' -- 11%

YouTube/Open Road Films

The 'Nut Job' gang looks on in despair as their home is destroyed.

'The Nut Job' gang is back at it again.

As is the case with many sequels, this follow-up film lacks good storytelling, and is reduced to nothing more than a trite plot. According to Monica Castillo's New York Times review, 'The jokes are thin, the computer animation is wanting and the inane plot is a series of set pieces strung together.'

1. 'The Emoji Movie' -- 7%

Sony

Poop emojis chatting in the bathroom, as is their way.

Unsurprisingly a movie that gives sentient poop emojis screen time was the biggest flop of the summer. Critics all seem to agree that the characters, plot, and basically everything else about this movie was abysmal, earning it a 7% rating on Rotten Tomatoes.

The Atlantic film critic Megan Garber explains the issues that contributed to the film's failure:

'The Emoji Movie is not just a critical flop, but also a metaphor for a Hollywood that is struggling to find the line between branding that audiences love and branding that audiences resent.'